add extended log output

common/list.c

@@ -199,3 +199,20 @@ list_append_list_strdup(struct list* self, struct list* dest, int start_index)
     list_add_item(dest, (tbus)dup);
   }
 }
+
+/*****************************************************************************/
+void APP_CC
+list_dump_items(struct list* self)
+{
+  int index;
+  tbus item;
+
+  if (self->count == 0)
+  {
+    g_writeln("List is empty");
+  }
+  for (index = 0; index < self->count; index++)
+  {
+    g_writeln("%d: %s", index, list_get_item(self, index));
+  }
+}

common/list.h

@@ -55,5 +55,7 @@ void APP_CC
 list_insert_item(struct list* self, int index, tbus item);
 void APP_CC
 list_append_list_strdup(struct list* self, struct list* dest, int start_index);
+void APP_CC
+list_dump_items(struct list* self);
 
 #endif

common/os_calls.c

@@ -1684,7 +1684,11 @@ g_get_strerror(void)
 int APP_CC
 g_get_errno(void)
 {
+#if defined(_WIN32)
+  return GetLastError();
+#else
   return errno;
+#endif
 }
 
 /*****************************************************************************/

sesman/sesman.c

@@ -114,12 +114,15 @@ sesman_main_loop(void)
     }
     else
     {
-      log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "listen error");
+      log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "listen error %d (%s)",
+                  g_get_errno(), g_get_strerror());
     }
   }
   else
   {
-    log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "bind error");
+    log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "bind error on "
+                "port '%s': %d (%s)", g_cfg->listen_port,
+                g_get_errno(), g_get_strerror());
   }
   g_tcp_close(g_sck);
 }

xrdp/xrdp_bitmap.c

@@ -448,6 +448,12 @@ xrdp_bitmap_load(struct xrdp_bitmap* self, const char* filename, int* palette)
     }
     g_file_close(fd);
   }
+  else
+  {
+    g_writeln("xrdp_bitmap_load: error loading bitmap from file [%s]",
+              filename);
+    return 1;
+  }
   free_stream(s);
   return 0;
 }

xrdp/xrdp_font.c

@@ -88,6 +88,8 @@ xrdp_font_create(struct xrdp_wm* wm)
   file_size = g_file_get_size(file_path);
   if (file_size < 1)
   {
+    g_writeln("xrdp_font_create: error reading font from file [%s]",
+              file_path);
     return 0;
   }
   self = (struct xrdp_font*)g_malloc(sizeof(struct xrdp_font), 1);

xrdp/xrdp_login_wnd.c

@@ -401,6 +401,10 @@ xrdp_wm_login_fill_in_combo(struct xrdp_wm* self, struct xrdp_bitmap* b)
   section_values->auto_free = 1;
   g_snprintf(cfg_file, 255, "%s/xrdp.ini", XRDP_CFG_PATH);
   fd = g_file_open(cfg_file); /* xrdp.ini */
+  if (fd < 1)
+  {
+    g_writeln("Could not read xrdp ini file %s", cfg_file);
+  }
   file_read_sections(fd, sections);
   for (i = 0; i < sections->count; i++)
   {

xrdp/xrdp_mm.c

@@ -309,13 +309,15 @@ xrdp_mm_setup_mod1(struct xrdp_mm* self)
   lib[0] = 0;
   if (xrdp_mm_get_lib(self, lib, 255) != 0)
   {
-    g_snprintf(text, 255, "error finding lib");
+    g_snprintf(text, 255, "no library name specified in xrdp.ini, please add "
+               "lib=libxrdp-vnc.so or similar");
     xrdp_wm_log_msg(self->wm, text);
     return 1;
   }
   if (lib[0] == 0)
   {
-    g_snprintf(text, 255, "error finding lib");
+    g_snprintf(text, 255, "empty library name specified in xrdp.ini, please "
+               "add lib=libxrdp-vnc.so or similar");
     xrdp_wm_log_msg(self->wm, text);
     return 1;
   }
@@ -331,7 +333,8 @@ xrdp_mm_setup_mod1(struct xrdp_mm* self)
       }
       if (func == 0)
       {
-        g_snprintf(text, 255, "error finding proc mod_init in %s", lib);
+        g_snprintf(text, 255, "error finding proc mod_init in %s, not a valid "
+                   "xrdp backend", lib);
         xrdp_wm_log_msg(self->wm, text);
       }
       self->mod_init = (struct xrdp_mod* (*)(void))func;
@@ -342,7 +345,8 @@ xrdp_mm_setup_mod1(struct xrdp_mm* self)
       }
       if (func == 0)
       {
-        g_snprintf(text, 255, "error finding proc mod_exit in %s", lib);
+        g_snprintf(text, 255, "error finding proc mod_exit in %s, not a valid "
+                   "xrdp backend", lib);
         xrdp_wm_log_msg(self->wm, text);
       }
       self->mod_exit = (int (*)(struct xrdp_mod*))func;
@@ -353,7 +357,8 @@ xrdp_mm_setup_mod1(struct xrdp_mm* self)
     }
     else
     {
-      g_snprintf(text, 255, "error loading %s", lib);
+      g_snprintf(text, 255, "error loading %s specified in xrdp.ini, please "
+                 "add a valid entry like lib=libxrdp-vnc.so or similar", lib);
       xrdp_wm_log_msg(self->wm, text);
     }
     if (self->mod != 0)

xrdp/xrdp_wm.c

@@ -197,6 +197,12 @@ xrdp_wm_load_pointer(struct xrdp_wm* self, char* file_name, char* data,
   make_stream(fs);
   init_stream(fs, 8192);
   fd = g_file_open(file_name);
+  if (fd < 1)
+  {
+    g_writeln("xrdp_wm_load_pointer: error loading pointer from file [%s]",
+              file_name);
+    return 1;
+  }
   g_file_read(fd, fs->data, 8192);
   g_file_close(fd);
   in_uint8s(fs, 6);
@@ -440,6 +446,10 @@ xrdp_wm_init(struct xrdp_wm* self)
       list_delete(values);
       g_file_close(fd);
     }
+    else
+    {
+      g_writeln("xrdp_wm_init: Could not read xrdp.ini file %s", cfg_file);
+    }
   }
   else
   {